Book Image

Introduction to Programming

By : Nick Samoylov
Book Image

Introduction to Programming

By: Nick Samoylov

Overview of this book

Have you ever thought about making your computer do what you want it to do? Do you want to learn to program, but just don't know where to start? Instead of guiding you in the right direction, have other learning resources got you confused with over-explanations? Don't worry. Look no further. Introduction to Programming is here to help. Written by an industry expert who understands the challenges faced by those from a non-programming background, this book takes a gentle, hand-holding approach to introducing you to the world of programming. Beginning with an introduction to what programming is, you'll go on to learn about languages, their syntax, and development environments. With plenty of examples for you to code alongside reading, the book's practical approach will help you to grasp everything it has to offer. More importantly, you'll understand several aspects of application development. As a result, you'll have your very own application running by the end of the book. To help you comprehensively understand Java programming, there are exercises at the end of each chapter to keep things interesting and encourage you to add your own personal touch to the code and, ultimately, your application.
Table of Contents (21 chapters)

Exercise – Interface versus abstract class

What is the difference between an interface and an abstract class? We did not talk about it, so you will need to do some research.

After the default methods of interfaces were introduced in Java 8, the difference shrunk significantly, and is negligible in many cases.

Answer

An abstract class can have a constructor, while an interface cannot.

An abstract class can have a state, while an interface cannot. The fields of an abstract class can be private and protected, while in an interface, fields are public, static, and final.

An abstract class can have method implementation with any access modifiers, while implemented default methods in an interface are public only.

If the class...